Shūgi-bukuro

[1] They are distinct from the category of envelopes of money given for funerals, known as fushūgibukuro or kōdenbukuro.

Shūgi-bukuro were traditionally hand-made by the person giving the money, a practice that has now largely fallen out of fashion.

[2] The amount given in shūgi-bukuro differs according to the givers' relationship to the couple, their social status and the style of venue.

[citation needed] It is common to give amounts in which the leading digits form an odd number, such as ¥10,000 or ¥30,000, in order to symbolize the fact that the newly married couple cannot be divided.

Likewise, multiples of 9 are avoided, as the pronunciation of this number - ku - is identical to the word for "suffering".